Table of contents

1. Introduction to Anatomy & Physiology5h 43m
2. Cell Chemistry & Cell Components12h 36m
3. Energy & Cell Processes10h 6m
4. Tissues & Histology10h 3m
5. Integumentary System2h 20m
6. Bones & Skeletal Tissue2h 16m
7. The Skeletal System2h 35m
8. Joints2h 17m
9. Muscle Tissue2h 33m
10. Muscles1h 11m
11. Nervous Tissue and Nervous System1h 35m
12. The Central Nervous System1h 6m
- Introduction to the Central Nervous System
  18m
- The Cerebrum
  48m
13. The Peripheral Nervous System1h 26m
14. The Autonomic Nervous System1h 38m
15. The Special Senses2h 41m
16. The Endocrine System2h 48m
17. The Blood3h 22m
18. The Heart3h 42m
19. The Blood Vessels3h 35m
20. The Lymphatic System3h 16m
21. The Immune System14h 37m
22. The Respiratory System3h 20m
23. The Digestive System2h 5m
24. Metabolism and Nutrition4h 0m
25. The Urinary System2h 39m
26. Fluid and Electrolyte Balance, Acid Base Balance37m
27. The Reproductive System2h 5m
28. Human Development1h 21m
29. Heredity3h 32m

2. Cell Chemistry & Cell Components

Introduction to Chemical Bonding

Anatomy & Physiology

2. Cell Chemistry & Cell Components

Introduction to Chemical Bonding

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Multiple Choice

Which component of the gram-negative cell wall is indicated by the arrow?

Peptidoglycan

Lipopolysaccharide

Teichoic acid

Phospholipid bilayer

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Verified step by step guidance

Understand the structure of a gram-negative bacterial cell wall, which consists of an outer membrane, a thin peptidoglycan layer, and an inner cytoplasmic membrane.

Recognize that the outer membrane of gram-negative bacteria contains lipopolysaccharides (LPS), which are large molecules consisting of a lipid and a polysaccharide composed of O-antigen, outer core, and inner core joined by a covalent bond.

Identify that peptidoglycan is a component of the cell wall that provides structural support and is located between the outer membrane and the inner cytoplasmic membrane in gram-negative bacteria.

Note that teichoic acids are typically found in gram-positive bacteria and are not a component of the gram-negative cell wall.

Understand that the phospholipid bilayer is part of the cell membrane structure, but in the context of the gram-negative cell wall, the lipopolysaccharide is the key component of the outer membrane indicated by the arrow.